In the kiln free Lime (C) and Belite (C2S) react to form Alite (C3S) which is the main component of cement giving it strength. However, the kiln discharges clinker at around 1300℃ and at that temperature the reaction is reversible. The role of the cooler is to rapidly reduce the temperature of alite preventing it from breaking into belite and free lime. Then, inside the cooler, the clinker is cooled quickly subjecting it to cooling air, and thereby stopping the reverse reaction. Dalmia’s low cement based special castables with a maximum service temperature of 1600℃ are highly resistant to abrasion and alkali attack.